Magnolia Pictures has released the trailer for Mister America, starring Tim Heidecker as...erm, Tim Heidecker. Okay, to be fair, Heidecker is playing a fictional version of himself but it turns out this is one of the many promising strokes of genius, as shown in this first look at the wry mockumentary. The American Vandal vibes are strong with this one — and as a big ol' fan of the Netflix series, I mean that as a compliment. There's also shades of Documentary Now!, too, as we follow the fictional Heidecker on the campaign trail to become the new District …